Well assembly for production of fluids from a plurality of zones



Sept. 29, 1959 B. N. RussELL ETAL A2,906,342

WELL ASSEMBLY FOR PRODUCTION OF FLUIDS -FRoM A PLURALITY oF zoNEsSheets-Sheet l Filed March 21, 1956 Muff 2 Sheets-Sheet 2 mi$1??;545474411551252515125,151,545 .l....

1959 B. N. RUSSELL z-:TAL

WELL ASSEMBLY FOR PRODUCTION OF FLUIDS FROM A PLURALITY OF ZONES Sept.

Filed March 21, 1956 INVNToRs. Bil/y lV. Russe/l, BY Roy E. Anderson,

Patented Sept. 29, 1959r United States Patent Oilice WELLASSEMBLY FOR`PRODUCTION OF FLUIDS FROM A PLURALITY OF ZONES Application March 21,1956, serial No. 572,963

20 Claims. (Cl. 16s- 115) The present invention is directed-to apparatusadapted for use in a well penetrating a plurality of productive zones.More particularly, the invention is directed to apparatus for completinga well in a plurality of zones. In its more specic aspects, theinvention has to do with a well assembly for production of uids fromspaced apart zones in a well bore.

The present invention may be brieily described as embodying apparatusadapted for use in a well penetrating a plurality of productive oil and/or gas zones, strata, horizons, formations, sands, and the like. Theapparatus comprises a retrievable elongated tubular member provided withmeans on its upper end for suspending the tubular member at a selectedpoint in a well pipe. An inner sleeve is telescopically arranged withinthe lower end of the tubular member and the outer peripheral surface ofthe sleeve extending within the tubular member and being provided withserrations. Removable holding means in the tubular member normally holdsthe inner sleeve in a telescopic position. Spring biased means in thetubular member are arranged for engaging the serrations for lockingthe'telescopic sleeve in an extended position on release of the holdingmeans.

The holding means may be a frangible shear pin, a"

ductile pin, which will stretch or deform, or a rupturable plate.

The upper end of the tubular member and the lower end of the telescopicsleeve are provided with externally arranged sealing means for sealingthe tubular member and the telescopic sleeve in thewell on arrangementof the apparatus therein. The lower end of the telescopic sleeve, 'inone embodiment, is suitably provided with a separately retrievabletubular member releasably attached to the lower end. of the telescopicsleeve. The sealing means may be arranged on the outer surface of theretrievable tubular member andA means are also provided on the outersurface of the separately retrievable tubular member for locating andpositioning'the sleeve in an eX- tended position in the well below theselected point.

The locating and positioning means may suitably cornprise spring biasedkeys arranged onthe outer surface of the separately retrievable tubularmember.

The separately retrievable tubular member is releasably attached to thetelescopic sleeve by frangible means, such as shearpins and the like.The lower end of the sleeve or the separately retrievable tubular memberreleasably attached to the sleeve may have a removable or releasableplug arranged therein which is removable or releasable from .the sleeveon positioning of the sleeve in the well. l

The device of the present invention is adapted to -be used with spacedapart first and second packers which isolate rst and second productivezones or horizons in a'well bore. The tubular member is seatable in atubing in a well casing at a selected point above the rst zone andadjacent the first packer. the separately retrievable tubular memberreleasably The telescopic sleeve ory attached to the telescopic sleeveis adapted to be sealed in the second packer and located and positionedtherein.

The present invention also comprises a well assembly for separateproduction of fluids from separate zones in: which spaced apart rst andsecond packers isolating iirst and second Zones in a well casing in thewell are provided. The first zone is in iluid communication with theSpace between the packers and the second zone is in liuid communicationwith the casing below the second packer. The tubular member of thepresent invention comprising the telescopically arranged sleeve issuspended and sealed in a first tubing in the casing at a selected pointabove the first zone and adjacent the rst packer. The telescopic sleeveis sealingly arranged and positioned in the second packer such thatproduction from the second zone is through the telescopic sleeve and thetubular member into the rst tubing while production from the VArst Zoneis through a second tubing communicating with the space between thepackers.

The present invention is quite advantageous and useful inpermanent wellcompletion operations. Theinvention is also useful in that it is nowpossible to position tubular members in the tubing to allow productionfrom.

both packers with a minimum amount of operating time and with positivesealing operations.

The present invention will be `further illustrated by ref-r erence tothe drawing in which:

Fig. 1 is an elevational view in partial section of one embodiment ofthe apparatus of the present invention with the telescopic sleeve intelescoped position;

Figs. 2 to 4, inclusive, are stepwise illustrations of the running in ofthe tubular member for positioning in a dually completed well;

Fig. 5 illustrates the removal of the tubular member from a duallycompleted well;

Fig. 6 is a' partial sectional view of the lower end ofanotherembodiment of the present invention;

Fig. 7 is an elevational view of the device of Fig. 6 arranged in a wellcasing;

Fig. 8 is a modification of the embodiment of Figs. 6 and 7; and Fig. 9is another embodiment of the embodiment of Figs. 6 and 7.

Referring now Vto the drawings and particularly to' Fig. 1,`numeral 11designates an elongated tubular mem` v ber provided witha supporting orsuspending means;

12 its upper end which suitably may be a supporting or suspending means,such as illustrated at page l4063 of the Composite Catalog of OilField'A and Pipelinel which are designed to provide a seal between thetubular member 11 and the inner wall of the tubing string. Y Threadedlyconnected to the upper section 15 of the tubular member-11 by matingthreads 16 is a lower sec- :ytion :17 ofV the tubular member 11 provideda' chamber 18. Arranged within vThe outer peripheral surface of thetelescopic sleeveYY 19 `is provided ,with serrationsv 22 which engage:with

locking means, suchasl slips 23, and are heldin-coneV tact' therewithbyj means of aI garter. spring 24. The'v slips 23" are arranged betweeninwardly Y prcjectin w.

shoulders 25 and 26 in the chamber 18. Y

the chamberlSris a telescopic sleeve' 19 having an annular shoulder orpiston 20 on its The lower section 17 of the tubular member 11 is vconnected to the telescopic sleeve 19 by frangible means, such as shearpins 27, which on rupture releases the sleeve 19 from the section 17 forslidable movement within the chamber 18.

- The lower portion 28 of the sleeve 19 which is of greater diameterthan the serrations 22 is threadedly connected by mating threads 30 to asleeve member 31. The sleeve member 31 is connected by frangible meansor shear pins 32 to a second tubular member 33 which is separatelyretrievable by means of a retrieving head or fishing neck 33a. A sealingmeans or O- ring 43 provides a seal between the tubular member 33 andthe sleeve 31.

Carried on the outer surface of the tubular member 33 are sealing means34 and 35. Also arranged on the outer surface of the tubular member 33are a plurality of locator keys 36 which are biased outwardly by meansof springs 37, the locator keys 36 being pivotally attached to themember 33 by pivot pins 38 in recesses 39.

It will be noted that the tubular member 11 made up of sections 15, 17and the telescopic sleeve 19 and sleeve 31 and second tubular member 33are provided with a passageway generally indicated by the numeral 40which extends through the tubular member 11. The lower end of thispassageway 40 may be closed by a plug member 41 releasably held thereinby frangible means, such as shear pin 42.

Referring now to Figs. 2 to 5, a well bore, such as 50, drilled from theearths surface to penetrate a plurality of spaced apart hydrocarbonproductive zones 51 and 52, has a casing 53 arranged therein andcemented in place with primary cement 54.

Perforations 55 have been made in the casing 53, cement 54 and formation51 by means of a gun perforator and perforations 56 have been made inthe casing 53, cement 54 and formation 52 also by means of a gunperforator. Arranged in the casing 53 is a first tubing string 57 whichextends to the surface of the earth and a second tubing string 58 alsoextending to the surface of the earth. The tubing string 57 is providedwith a landing nipple or supporting or anchoring means 59, which isprovided with a side port 57a and is described in the Composite Catalogsupra at page 4048, while the tubing S connects into a passageway 60 ina packer 61 arranged on the lower end of the tubing 57.

Port 57a, upon removal of the retrievable production tube assembly,permits circulation between the tubing strings and the casing-tubingannulus. With the production tube assembly in place, the port 57a in theside port nipple is sealed off by packing elements 13 and 14.

Prior to placement of the tubing string 57 and the packer 61, a packer62 is arranged in the well casing 53, the packer 62 being provided withan elongated locator landing nipple 63 which is similar to landingnipple 59.

In Fig. 2 the tubular extension member 11 is lowered in the tubing 57 bymeans of a wire line 64 connecting to a grappling tool 65 and to fishingneck 10 to position the tubular member 11 with its hanger assembly 12 inthe landing nipple 59 as shown more clearly in Fig. 3. It is to be notedin Fig. 3 that the sealing means 13 and 14 are sealingly engaged withthe inner wall of the tubing 57 but the sealing means 34 and 35 are notin engagement.

Thereafter, as shown in Fig. 4, the separately retrievable member 33,sleeve 31, and telescopic member 19 are extended by exerting fluidpressure lthrough the passageway 40 on the annular shoulder- 20 whichcauses the shear pin 27 to be fractured which allows the sleeve 19 to beforced downwardlyby pressure eX- erted thereon in passageway 40. Thiscauses the separately retrievable member 33 on which sealing means 34and 35 are arranged and locator key 36 to be positioned in the locatorlanding nipple 63, as shown in Fig. 4. After the sleeve 19 and thetubular member 33 have been positioned in the locator landing nipple 63and packer 62, additional uid pressure s exerted through the passageway40 on plug 41 which causes the shear pins 42 to be sheared and allowsthe plug 41 to be blown from the passageway 40.

With the seating of the tubular member 33 in the locator landing nipple63, production may then be had from the formation or sand 51 throughperforations 55 into the space S between the packers 61 and 62 and upthrough passageway 60 in packer 61 into tubing 58 and thence to theearths surface. Production from formation or sand 52 may be had throughperforations 56, up through passageway 40 in tubular member 11, intotubing string 57, and thence to the earths surface.

After the tubular member 11 has been used for production from the sandsor formations 51 and 52 and it is desired to pull the tubular member 11from the casing 53, this may suitably be done as shown in Fig. 5 byattaching the wire line 64 Vby means of grappling tool 65 to thefishing. head 10 and taking an upward pull on the tubular member 11.This causes the section 17 to be pulled farther out of the sleeve 19 andallows unseating of the packing members 13 and 14 while the sealingmembers 34 and 35 remain seated in the locator landing nipple 63.

' Thereafter on further upward pull, the tubular member 33 carrying thesealing means 34 and 35 is removed from the locator landing nipple 63and the complete assembly removed through the tubing 57.

Should the separately retrievable member 33 become stuck, the separatelyretrievable tubular member acts as a safety joint and a continued upwardpull will cause the shear pin 32 to be sheared allowing the tubularmember 11 comprised of the sections 15, 17, the telescopic member 19,and sleeve 31 to be pulled from the tubing, leaving the separatelyretrievable member 33 in the locator landing nipple 32 for separateretrieving by connecting a wire line fishing tool to the fishing head33a.

After the device of Figs. l to 5 has been employed and it is desired torecomplete the Well, such as by cementing either formation 51 or 52 orboth and reperforating therein, or perforating in another of a pluralityof vertically spaced apart hydrocarbon productive zones, theperforations 55 and 56 may be sealed by depositing a low water lossfluid cement of the modified type, such as described in the patent toSalathiel U.S. 2,582,459. This low water loss cement slurry maysuitablyl be an oil emulsion cement or other 'cement having lowfiltration characteristics which will form plugs or nodules in theperforations 55 and 56. i

To practice this step a tubular extension member, such as 7 0, shownmore clearly in Figs. 6 and 7, provided with a hanger assembly 12 and afishing neck 10 and provided with a packing means 71, is suitably runinto the well casing 53 through the tubing 57. The tubular member 70 maysuitably comprise a tail pipe section 72 having a depending sleeve 73which is provided on its outer peripheral surface with serrations 74.The sleeve 73, as shown more clearly in Fig. 6, is enclosed by an outersleeve 75 which is held on the sleeve 73 by means of a shear pin orother frangible or releasable means 76 which connects the sleeve 73 withthe sleeve 75. Sealing members, such as O-rings 77, are arranged inrecesses and provide a seal between a shoulder 78 on the lower end ofsleeve 73 and the inner surface of the sleeve 75.

The shear pin 76 may be of a ductile metal which willdeform and suitablymay be constructed of a metal such as aluminum or an alloy of aluminum,the shear pin 76 being connected to wire line 64 which extends through apassageway 79 in the tubular extension member 73.

Shear pin 76should be made of aluminum or similar ductile material whichwould have a tendency to bend in the middle, when force is applied atthat point, allowing the ends of the shear pin to pull out of the shearpin recess rather than permit shearing ofthe pin. The top of the shearpin recess in sleeve 73 may be slightly beveled or rounded which wouldaid bending of the shear pin allowing the ends of the shear pin to bepulled from the recess.

The wire line 64 in this embodiment of the present invention may have agrappling tool 65 arranged thereon for engagement with the fishing neck10. The wire line 614 in this embodiment may be provided with a weightmember 80 to maintain the Wire line 64 in a taut position.

As shown more clearly in Fig. 7, the tubular extension member 70 may becomprised of the sleeve section 75, the depending sleeve 73 and the tailpipe member 72.

It may be desirable to provide aplurality of telescopic sections and,this embodiment, a second depending sleeve 81. which is similar tosleeve 73, is connected to the sleeve' member 7 5. This depending sleevemember 81 is also provided with serrations for engagement with slipsegments, such as 33, shown more clearly in Fig. 6 which are biased intoengagement with the serrations 74 by means of a garter spring, such asS4, the slip segments 83 being arranged between shoulders 85 and S6 inthe' sleeve 75. Similar slip segments are arranged within a telescopichousing or sleeve section 87 to allow the tubular extension member 70 tobe extended to its fullest extent.

After the device of Figs. 6 and 7 has been extended by upward pull onthe wire line 64 to pull the ductile shear pins 76, the sleeves 75 andS7 will extend the tubular extension member to its expanded positionwith the slip segments 83 locking in the serration 73 and preventing thecollapse of the telescopic housings 75 and 87. In other words, thelocking device or serrations and spring biased slip segments maintainthe tubular extension member 70 in its expanded position. Thereaftercement may be deposited, for example, in the perforations 55 or 56 asmay be desired, the maximum outer diameter of the tubular extensionmember 7 0 being selected such that it may be lowered through the tubing57 and through the locator landing nipple 63 as may be desired.

While cement may be owed downwardly through the passageway 79 to sealthe perforations 55 and 56, it is possible to conduct other operations,such as acidizing, stimulation with oil containing suitable agents, orto inject other uids into the perforated formation, such as fracturinguids, which may include acid gels, crude petroleum and the like, whichmay contain a propping agent, such as sand, to increase the permeabilityof the formation, such as 51 or 52, by imposing a suicient pressure onthe formations to cause cracks or fractures to be formed therein. It isalso possible to employ the tubular extension member 70 as a productiontube, if desired, but it would be more useful as a tool for treatingformations below the lower open end of the tubing, such as 57, locatedwith the lower open end below a plurality of hydrocarbon productivezones.

Fig. 8 illustrates a modification of Figs. 6 and 7 in which the shearpin 76 has been replaced by a rupture disc, such as 90, composed of afrangible metal such as magnesium or aluminum alloy. When it is desiredto release the housing or sleeve 75, pressure may be exerted on therupture disc 90 through the passageway 79 either from the earths surfaceor from the formation to cause the rupturing of the disc 90 and therelease of the sleeves 75 or 81.

In Fig. 8 the rupture disc 90 is illustrated as an optional replacementfor the ductile shear pins 76. Instead of this arrangement for releasingthe telescoping joints utilizing a rupture disc the disc may be locatedbelow the bottom Vlocking telescoping joint and use conventional shearpins to suspend the telescoping housing as shown in Fig. 9, of which amajor portion is similar to that shown in Fig. 1. Referring now to Fig.9, after seating the hanger assembly inthe landing nipple, such asillustrated in Fig. 7, surface pump pressure on the casing would createan upward force on the rupture disc' 90 .which would tend to collapsethe telescoping joint 19.

When this upward force reached a predetermined point the shear pins 27would shear, then an increase in upward force (casing pressure) to aknown point would rupture the frangible disc 9G. -After shearingV thepins 27 and rupturing the disc 90, the telescoping joints would beunlocked and ready for use. The metal for thefrangible rupture disc 90could be either magnesium or an aluminum alloy.

It will be seen from the' foregoing description that a new and improvedapparatus has been provided wherein production may be had from aplurality of hydrocarbon productive zones with the assembly positivelylocated at the desired point.

For example, in the embodiments of Figs. 1 to 5, inclusive, the packers61 and 62 may be spaced apart a distance from about 30 to about 35 feetbut this distance will depend, of course, on the distance between thehydrocarbon productive zones which are to be produced simultaneously. l

The telescopic joint or sleeve, such as joint 19, may have a length from'about 3 to about 5 feet which will allow 2 to 4 feet of movement of thesealing means 13 and 14 before the lower seals 34 and 35 are unseated.Of'course, other dimensions may be employed but these dimensions may befound satisfactory.

In practicing the present invention with the device of Figs. l to 5,inclusive, the shear pin 27 will be of least strength` and will shearrst and the shear pin 42 will be next greatest in strength and willshear second while the shear pin 32 will be of greatest strength andwill shear last, the strength of the shear pins being selected for thisorder of rupturing or shearing.

The provision of a device of the nature illustrated more particularly inFigs. l to 5 has eliminated diiculties in that the sealing assemblies 34and 35 carried on the tubular member 33 no longer have the tendency tobe pumped down through the packer such as 62.

Furthermore, the device of Figs. 6 to 9 is quite advantageous in thatthe telescopic joints. are locked open after 'extending and do not tendto close while reversing out excess cement slurry when employed incementing operations. Furthermore, the device of Figs. 6 to 9 is usefulin sand washing and squeeze cementing operations. Not infrequently, sandmay accumulate in the casing and it is necessary to remove this sandbefore other operations may be conducted. By providing a device such asin Figs. 6 to 9, operating time may be saved by employing such a device.

The nature and objects of the present invention havingy been completelydescribed and illustrated, what We wish to claim as new and useful andto secure by Letters Patent is:

1. Apparatus adapted for use in a well which comprises a retrievableelongated tubular member provided with means on its upper end forsuspending said elongated tubular member at a selected point in a wellpipe, a telescopic tubular member carried by the elongated tubularmember on its lower end, one of said tubular members being arranged inembraceable relationship with the other of said tubular members,coengageable means on each of said tubular members for maintaining saidtubular members together when in an extended position, the embracedouter peripheral surface of the embraced of said tubular members beingprovided with serrations, holding means in said elongated tubular memberVengaging -with Vsaid telescopic tubular member and initially'holdingsaid telescopic tubular member in a telescoped position, and springbiased means carried by said elongated tubular member engageable withvSaid serrations for locking said telescopic tubular V member againsttelescoping movement on release ofv said holdingmeans, said holdingmeans being released by exerting ypressure against said telescopictubular member.

2. Apparatus in accordance with claim 1 in which the upper end of saidelongated tubular member is provided with means for sealing saidelongated tubular member in said well pipe.

Y 3. Apparatus in accordance with claim 1 in which the holding means isa frangible shear pin.

4. Apparatus in accordance with claim 1 in which the holding means is aductile pin.

5. Apparatus in accordance with claim l in which the holding means is arupturable plate.

6. Apparatus in accordance with claim l in which the upper end of thetubular member and the lower end of the telescopic tubular member areprovided with externally arranged sealing means for sealing the tubularmember and the telescopic tubular member in said well on arrangement ofthe apparatus therein.

7. Apparatus in accordance with claim 1 in which the lower end of saidtelescopic tubular member is provided with a separately retrievabletubular member releasably attached to the lower end of the telescopictubular member, said separately retrievable tubular member havingsealing means arrangedl on its outer surface adapted to seal with theinner wall of a conduit in said well below said selected point andseparate means also arranged on the outer surface of said separatelyretrievable tubular member for locating and stationarily positioningsaid separately retrievable tubular member in said conduit whereby thetelescopic tubular member is maintained in its extended position.

8. Apparatus in accordance with claim 7 in which the locating andpositioning means comprise spring biased keys.

9. Apparatus in accordance with claim 7 in which the separatelyretrievable tubular member is releasably attached to the telescopictubular member by frangible means.

l0. Apparatus in accordance with claim 7 in which the separatelyretrievable tubular member has a releasable plug arranged therein.

11. Apparatus adapted for use in a well having a well pipe arrangedtherein and provided with spaced apart iirst and second packersisolating irst and second productive zones in said well, said rst packerbeing arranged on said well pipe adjacent the lower end of said wellpipe and said second packer being spaced from the tirst packer in saidVwell below the wellpipe, which apparatus comprises a retrievableelongated tubular member provided with means on its upper end forsuspending said elongated tubular member at a selected point in saidwell pipe, a telescopic tubular member carried by the elongated tubularmember on its lower end, one of said tubular members being arranged inembraceable relationship with the other of said tubular members,coengageable means on each of said tubular members for maintaining saidtubularmembersl together when in an extended position, the embracedouter peripheral surface of the embraced of said tubular members beingprovided with serrations, holding means in said elongated tubular memberengaging with said telescopic tubular member and initially holding saidtelescopic tubular member in a telescoped position, and spring biasedmeans carried by said elongated tubular member engageable with saidserrations for locking said telescopic tubular member againsttelescoping movement on release of said holding means, said holdingmeans being released by exerting pressure against said telescopictubular member, sealing means on the upper end of said elongated tubularmember for sealing said elongated tubular member in said well pipe, aseparately retrievable tubular member releasably attached at its upperend to the lower end of the telescopic tubular member, said separatelyretrievable tubular member having sealing'lmeans arranged on its outersurface for sealing? the separately retrievable tubular member inthesecond packer, and separate means also arranged on the outer surface ofsaid separately retrievable tubular member for locating andstationai'ily positioning said separately retrievable tubular member insaid second packer whereby the telescopic tubular member is maintainedin extended position.

12j. Apparatus adapted for use in a well having a well pipe arrangedtherein and provided with spaced apart rst and second packers isolatingrst and second productive zones in said well, said first packer beingarranged on said well pipe adjacent the lower end of said well pipe andsaid second packer being spaced from the first packer in said well belowthe well pipe, which apparatus comprises a retrievable elongated tubularmember provided with means on its upper end for suspending saidelongated tubular member at a selected point in said well pipe, atelescopic tubular member carried by the elongated tubular member on itslower end, one of said tubular members being arranged in embraceablerelationship with the other of said tubular members, coengageable meanson each of said tubular members for maintaining said tubular memberstogether when in an extended position, the embraced outer peripheralsurface of the embraced of said tubular members being provided withserrations, holding means in said elongated tubular member engaging withsaid telescopic tubular member and initially holding said telescopictubular member in a telescoped position, and spring biased means carriedby said elongated tubular member engageable with said serrations forlocking said telescopic tubular member against telescoping movement onrelease of said holding means, said holding means being released byexerting pressure against said telescopic tubular member, sealing meanson the upper end of said elongated tubular member for sealing saidelongated tubular member in said well pipe, sealing means arranged onthe outer surface of the telescopic tubular member for sealing thetelescopic tubular member in its extended position in the second packer,`and separate means also arranged on the outer surface of saidtelescopic tubular member for locating and stationarily positioning saidtelescopic tubular member in said second packer whereby said telescopictubular member is maintained in its extended position.

13. Apparatus in accordance with claim 12 in which the lower end of thetelescopic sleeve is closed with a removable plug.

14. An assembly for separate production of uids from separate zones in awell having a casing therein which comprises a iirst well tubing in thecasing arranged with its lower end above a rst Zone, a rst packerarranged on said iirst well tubing adjacent its lower end, a secondpacker arranged in said casing below the irst well tubing, said firstand second packers isolating first and second zones in said well, saidcasing being perforated opposite said zones, the iirst Zone being intluid communication with the space within the casing between the packersand the second zone being in fluid communication with the casing belowthe second packer, a retrievable elongated tubular member provided withmeans on its upper end for suspending said elongated tubular member insaid irst well tubing at a selected point above the tlrst zone andadjacent the first packer, a telescopic tubular member carried by theelongated tubular member on its lower end, one of said tubular membersbeing arranged in embraceable relationship with the other of saidtubular 'members, coengageable means on each of said tubular members formaintaining said tubular members together when in an extended position,the embraced outer peripheral surface of said embraced one of saidtubular members being provided with serrations, holding means in saidelongated member engaging with said telescopic tubular member andinitially holding said telescopic tubular member in a telescopcdposition, and spring biased means carried by said elongated tubularmember engageable with said serrations for locking said telescopictubular member against telescoping movement on release of said holdingmeans, said holding means being released by exerting pressure againstsaid telescopic tubular member, sealing means on the upper end of saidelongated tubular member for sealing said elongated tubular member insaid first tubing, sealing means arranged on the outer surface of thetelescopic tubular member for sealing the telescopic tubular member inits extended position in the second packer, separate means also arrangedon the outer surface of said telescopic tubular member for locating andstationarily positioning said telescopic tubular member in said packerwhereby said telescopic tubular member is maintained in its extendedposition, and a second tubing communicating tluidly with said space forproduction of fluid from the iirst zone, production of uid from thesecond zone being through the telescopic tubular member and theelongated tubular member into the rst tubing.

15. An yassembly for separate production of iluids from separate zonesin a Well having a casing therein which comprises a lirst well tubing inthe casing arranged with its lower end above a rst zone, a rst packerarranged on'said first well tubing adjacent its lower end, a secondpacker arranged in said casing below the irst well tubing, said rst andsecond packers isolating rst and second zones in said well, said casingbeing perforated opposite said zones, the rst zone being in liuidcommunication with the space within the casing between the packers andthe second Zone being in iluid communication with the casing below thesecond packer, a retrievable elongated tubular member provided withmeans on its upper end for suspending said elongated tubular member insaid rst well tubing at a selected point above the first zone andadjacent the rst packer, a telescopic tubular member carried by theelongated tubular member on its lower end,- one of said tubular membersbeing arranged in embraceable relationship with the other of saidtubular members, coengageable means on each of said tubular members formaintaining said tubular members together when in an extended position,the embraced outer peripheral surface of said embraced one of saidtubular members being provided with serrations, holding means in saidelongated tubular member engaging with said telescopic tubular memberand initially holding said telescopic tubular member in a telescopedposition, and spring biased means carried by said elongated tubularmember engageable with said serrations for locking said telescopictubular member against telescoping movement on release of said holdingmeans, said holding means being released by exerting pressure againstsaid telescopic tubular member, sealing means on the upper end of saidelongated tubular member -for sealing said elongated tubular member insaid rst well tubing, a separately retrievable tubular member releasablyattached fto the lower end of the telescopic tubular member,

said separately retrievable tubular member having means arranged on itsouter surface for sealing the separately retrievable tubular member inthe s econd packer, separate means also arranged on the outer surface ofsaid separately retrievable tubular member for locating and stationarilypositioning said separately retrievable tubular member in the secondpacker wherebyv the telescopic tubular member is maintained in itsextended position, and a -second tubing communicating uidly with saidspace for production of uid from the rst zone, production of ftluid fromthe second zone being through the telescopic tubular member and theelongated tubular member into the rst tubing.

16. Apparatus adapted for use in ya well which comprises a retrievableelongated tubular member provided with means on its upper end forsuspending said elongated tubular member at a selected point in a wellpipe, said elongated tubular member being comprised of a. telescopingtubular section and a tubular sleeve section arranged within thetelescoping tubular section and forming the lower end of the elongatedtubular member, one of said sections being movable relative to the othersection, said sections each being provided with coengageable means formaintaining said sections together when in an extended position, saidinner sleeve section being formed to provide -serrations on its outerperipheral surface, holding means in said elongated tubular memberinitially holding said sections in telescoped position, and springbiased means carried by said elongated tubular member engageable withsaid serrations for locking said telescoping sleeve section againsttelescoping movement relative to said sleeve section on release of saidholding means by exerting pressure against said inner sleeve.

17. Apparatus in accordance with claim 16 in which the sleeve section isrigidly connected to the telescoping section.

18. Apparatus in accordance with claim 16 in which the sleeve section isslidably connected to the telescoping section.

19. Apparatus in accordance with claim 16 in which the telescopingvsection is slidably connected to the lower end of the sleeve section.

20. Apparatus in laccordance with claim '16 in which the telescopingsection is movably mounted on the sleeve sectlon.

References Cited in the le of this patent UNITED STATES PATENTS2,368,428 Saurenman Jan. 30, 1945 2,749,989 Huber June 12, 19562,757,741 OReilly Aug. 7, 1956 2,782,860 Tausch et al. Feb. 26, 19572,822,048 Tausch Feb. 4, 1958

